Onekama is a village in Manistee County in the U.S. state of Michigan. The population was 399 at the 2020 census. The village is located on the northeast shore of Portage Lake and is surrounded by Onekama Township. The town's name is derived from Ona-ga-maa, an Anishinaabe word which means "singing water".

Manistee County is a county located in the U.S. state of Michigan. As of the 2020 census, the population was 25,032. The county seat is Manistee. The county is named for the Manistee River. Manistee County is part of Northern Michigan and has a shoreline on Lake Michigan.